The time you become confident in some art is the time you get bad at it. Not because confidence damages, confidence helps, but because your mother will notice that and will make some machiavelic plan to demoralize you.
While you perform bad she does nothing, you are not yet feeling well (or at least she thinks that) , but as she sees a bright in your eye that you excel in something, that´s the trigger for her brain to work. She will call Shirakawa, we have an opportunity! Oh, let´s not waste it! And there goes all your efforts to do whatever you wanted to do.
All her family does that. It is genetic. The Italian gene of cannibalism.